xref: /dokuwiki/inc/media.php (revision cae2ec44b84adb8b2364364aca166b1318be123a) 
1<?php
2/**
3 * All output and handler function needed for the media management popup
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9if(!defined('DOKU_INC')) die('meh.');
10if(!defined('NL')) define('NL',"\n");
11
12/**
13 * Lists pages which currently use a media file selected for deletion
14 *
15 * References uses the same visual as search results and share
16 * their CSS tags except pagenames won't be links.
17 *
18 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
19 *
20 * @param array $data
21 * @param string $id
22 */
23function media_filesinuse($data,$id){
24    global $lang;
25    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
26    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
27
28    $hidden=0; //count of hits without read permission
29    foreach($data as $row){
30        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
31            echo '<div class="search_result">';
32            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
33            echo '</div>';
34        }else
35            $hidden++;
36    }
37    if ($hidden){
38        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
39    }
40}
41
42/**
43 * Handles the saving of image meta data
44 *
45 * @author Andreas Gohr <andi@splitbrain.org>
46 * @author Kate Arzamastseva <pshns@ukr.net>
47 *
48 * @param string $id media id
49 * @param int $auth permission level
50 * @param array $data
51 * @return false|string
52 */
53function media_metasave($id,$auth,$data){
54    if($auth < AUTH_UPLOAD) return false;
55    if(!checkSecurityToken()) return false;
56    global $lang;
57    global $conf;
58    $src = mediaFN($id);
59
60    $meta = new JpegMeta($src);
61    $meta->_parseAll();
62
63    foreach($data as $key => $val){
64        $val=trim($val);
65        if(empty($val)){
66            $meta->deleteField($key);
67        }else{
68            $meta->setField($key,$val);
69        }
70    }
71
72    $old = @filemtime($src);
73    if(!file_exists(mediaFN($id, $old)) && file_exists($src)) {
74        // add old revision to the attic
75        media_saveOldRevision($id);
76    }
77    $filesize_old = filesize($src);
78    if($meta->save()){
79        if($conf['fperm']) chmod($src, $conf['fperm']);
80        @clearstatcache(true, $src);
81        $new = @filemtime($src);
82        $filesize_new = filesize($src);
83        $sizechange = $filesize_new - $filesize_old;
84
85        // add a log entry to the media changelog
86        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited'], '', null, $sizechange);
87
88        msg($lang['metasaveok'],1);
89        return $id;
90    }else{
91        msg($lang['metasaveerr'],-1);
92        return false;
93    }
94}
95
96/**
97 * check if a media is external source
98 *
99 * @author Gerrit Uitslag <klapinklapin@gmail.com>
100 *
101 * @param string $id the media ID or URL
102 * @return bool
103 */
104function media_isexternal($id){
105    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
106    return false;
107}
108
109/**
110 * Check if a media item is public (eg, external URL or readable by @ALL)
111 *
112 * @author Andreas Gohr <andi@splitbrain.org>
113 *
114 * @param string $id  the media ID or URL
115 * @return bool
116 */
117function media_ispublic($id){
118    if(media_isexternal($id)) return true;
119    $id = cleanID($id);
120    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
121    return false;
122}
123
124/**
125 * Display the form to edit image meta data
126 *
127 * @author Andreas Gohr <andi@splitbrain.org>
128 * @author Kate Arzamastseva <pshns@ukr.net>
129 *
130 * @param string $id media id
131 * @param int $auth permission level
132 * @return bool
133 */
134function media_metaform($id,$auth){
135    global $lang;
136
137    if($auth < AUTH_UPLOAD) {
138        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
139        return false;
140    }
141
142    // load the field descriptions
143    static $fields = null;
144    if(is_null($fields)){
145        $config_files = getConfigFiles('mediameta');
146        foreach ($config_files as $config_file) {
147            if(file_exists($config_file)) include($config_file);
148        }
149    }
150
151    $src = mediaFN($id);
152
153    // output
154    $form = new Doku_Form(array('action' => media_managerURL(array('tab_details' => 'view'), '&'),
155                                'class' => 'meta'));
156    $form->addHidden('img', $id);
157    $form->addHidden('mediado', 'save');
158    foreach($fields as $key => $field){
159        // get current value
160        if (empty($field[0])) continue;
161        $tags = array($field[0]);
162        if(is_array($field[3])) $tags = array_merge($tags,$field[3]);
163        $value = tpl_img_getTag($tags,'',$src);
164        $value = cleanText($value);
165
166        // prepare attributes
167        $p = array();
168        $p['class'] = 'edit';
169        $p['id']    = 'meta__'.$key;
170        $p['name']  = 'meta['.$field[0].']';
171        $p_attrs    = array('class' => 'edit');
172
173        $form->addElement('<div class="row">');
174        if($field[2] == 'text'){
175            $form->addElement(form_makeField('text', $p['name'], $value, ($lang[$field[1]]) ? $lang[$field[1]] : $field[1] . ':', $p['id'], $p['class'], $p_attrs));
176        }else{
177            $att = buildAttributes($p);
178            $form->addElement('<label for="meta__'.$key.'">'.$lang[$field[1]].'</label>');
179            $form->addElement("<textarea $att rows=\"6\" cols=\"50\">".formText($value).'</textarea>');
180        }
181        $form->addElement('</div>'.NL);
182    }
183    $form->addElement('<div class="buttons">');
184    $form->addElement(form_makeButton('submit', '', $lang['btn_save'], array('accesskey' => 's', 'name' => 'mediado[save]')));
185    $form->addElement('</div>'.NL);
186    $form->printForm();
187
188    return true;
189}
190
191/**
192 * Convenience function to check if a media file is still in use
193 *
194 * @author Michael Klier <chi@chimeric.de>
195 *
196 * @param string $id media id
197 * @return array|bool
198 */
199function media_inuse($id) {
200    global $conf;
201
202    if($conf['refcheck']){
203        $mediareferences = ft_mediause($id,true);
204        if(!count($mediareferences)) {
205            return false;
206        } else {
207            return $mediareferences;
208        }
209    } else {
210        return false;
211    }
212}
213
214define('DOKU_MEDIA_DELETED', 1);
215define('DOKU_MEDIA_NOT_AUTH', 2);
216define('DOKU_MEDIA_INUSE', 4);
217define('DOKU_MEDIA_EMPTY_NS', 8);
218
219/**
220 * Handles media file deletions
221 *
222 * If configured, checks for media references before deletion
223 *
224 * @author             Andreas Gohr <andi@splitbrain.org>
225 *
226 * @param string $id media id
227 * @param int $auth no longer used
228 * @return int One of: 0,
229 *                     DOKU_MEDIA_DELETED,
230 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
231 *                     DOKU_MEDIA_NOT_AUTH,
232 *                     DOKU_MEDIA_INUSE
233 */
234function media_delete($id,$auth){
235    global $lang;
236    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
237    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
238    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
239
240    $file = mediaFN($id);
241
242    // trigger an event - MEDIA_DELETE_FILE
243    $data = array();
244    $data['id']   = $id;
245    $data['name'] = utf8_basename($file);
246    $data['path'] = $file;
247    $data['size'] = (file_exists($file)) ? filesize($file) : 0;
248
249    $data['unl'] = false;
250    $data['del'] = false;
251    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
252    if ($evt->advise_before()) {
253        $old = @filemtime($file);
254        if(!file_exists(mediaFN($id, $old)) && file_exists($file)) {
255            // add old revision to the attic
256            media_saveOldRevision($id);
257        }
258
259        $data['unl'] = @unlink($file);
260        if($data['unl']) {
261            $sizechange = 0 - $data['size'];
262            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted'], '', null, $sizechange);
263
264            $data['del'] = io_sweepNS($id, 'mediadir');
265        }
266    }
267    $evt->advise_after();
268    unset($evt);
269
270    if($data['unl'] && $data['del']){
271        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
272    }
273
274    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
275}
276
277/**
278 * Handle file uploads via XMLHttpRequest
279 *
280 * @param string $ns   target namespace
281 * @param int    $auth current auth check result
282 * @return false|string false on error, id of the new file on success
283 */
284function media_upload_xhr($ns,$auth){
285    if(!checkSecurityToken()) return false;
286    global $INPUT;
287
288    $id = $INPUT->get->str('qqfile');
289    list($ext,$mime) = mimetype($id);
290    $input = fopen("php://input", "r");
291    if (!($tmp = io_mktmpdir())) return false;
292    $path = $tmp.'/'.md5($id);
293    $target = fopen($path, "w");
294    $realSize = stream_copy_to_stream($input, $target);
295    fclose($target);
296    fclose($input);
297    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
298        unlink($path);
299        return false;
300    }
301
302    $res = media_save(
303        array('name' => $path,
304            'mime' => $mime,
305            'ext'  => $ext),
306        $ns.':'.$id,
307        (($INPUT->get->str('ow') == 'true') ? true : false),
308        $auth,
309        'copy'
310    );
311    unlink($path);
312    if ($tmp) io_rmdir($tmp, true);
313    if (is_array($res)) {
314        msg($res[0], $res[1]);
315        return false;
316    }
317    return $res;
318}
319
320/**
321 * Handles media file uploads
322 *
323 * @author Andreas Gohr <andi@splitbrain.org>
324 * @author Michael Klier <chi@chimeric.de>
325 *
326 * @param string     $ns    target namespace
327 * @param int        $auth  current auth check result
328 * @param bool|array $file  $_FILES member, $_FILES['upload'] if false
329 * @return false|string false on error, id of the new file on success
330 */
331function media_upload($ns,$auth,$file=false){
332    if(!checkSecurityToken()) return false;
333    global $lang;
334    global $INPUT;
335
336    // get file and id
337    $id   = $INPUT->post->str('mediaid');
338    if (!$file) $file = $_FILES['upload'];
339    if(empty($id)) $id = $file['name'];
340
341    // check for errors (messages are done in lib/exe/mediamanager.php)
342    if($file['error']) return false;
343
344    // check extensions
345    list($fext,$fmime) = mimetype($file['name']);
346    list($iext,$imime) = mimetype($id);
347    if($fext && !$iext){
348        // no extension specified in id - read original one
349        $id   .= '.'.$fext;
350        $imime = $fmime;
351    }elseif($fext && $fext != $iext){
352        // extension was changed, print warning
353        msg(sprintf($lang['mediaextchange'],$fext,$iext));
354    }
355
356    $res = media_save(array('name' => $file['tmp_name'],
357                            'mime' => $imime,
358                            'ext'  => $iext), $ns.':'.$id,
359                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
360    if (is_array($res)) {
361        msg($res[0], $res[1]);
362        return false;
363    }
364    return $res;
365}
366
367/**
368 * An alternative to move_uploaded_file that copies
369 *
370 * Using copy, makes sure any setgid bits on the media directory are honored
371 *
372 * @see   move_uploaded_file()
373 *
374 * @param string $from
375 * @param string $to
376 * @return bool
377 */
378function copy_uploaded_file($from, $to){
379    if(!is_uploaded_file($from)) return false;
380    $ok = copy($from, $to);
381    @unlink($from);
382    return $ok;
383}
384
385/**
386 * This generates an action event and delegates to _media_upload_action().
387 * Action plugins are allowed to pre/postprocess the uploaded file.
388 * (The triggered event is preventable.)
389 *
390 * Event data:
391 * $data[0]     fn_tmp:    the temporary file name (read from $_FILES)
392 * $data[1]     fn:        the file name of the uploaded file
393 * $data[2]     id:        the future directory id of the uploaded file
394 * $data[3]     imime:     the mimetype of the uploaded file
395 * $data[4]     overwrite: if an existing file is going to be overwritten
396 * $data[5]     move:      name of function that performs move/copy/..
397 *
398 * @triggers MEDIA_UPLOAD_FINISH
399 *
400 * @param array  $file
401 * @param string $id   media id
402 * @param bool   $ow   overwrite?
403 * @param int    $auth permission level
404 * @param string $move name of functions that performs move/copy/..
405 * @return false|array|string
406 */
407function media_save($file, $id, $ow, $auth, $move) {
408    if($auth < AUTH_UPLOAD) {
409        return array("You don't have permissions to upload files.", -1);
410    }
411
412    if (!isset($file['mime']) || !isset($file['ext'])) {
413        list($ext, $mime) = mimetype($id);
414        if (!isset($file['mime'])) {
415            $file['mime'] = $mime;
416        }
417        if (!isset($file['ext'])) {
418            $file['ext'] = $ext;
419        }
420    }
421
422    global $lang, $conf;
423
424    // get filename
425    $id   = cleanID($id);
426    $fn   = mediaFN($id);
427
428    // get filetype regexp
429    $types = array_keys(getMimeTypes());
430    $types = array_map(
431        function ($q) {
432            return preg_quote($q, "/");
433        },
434        $types
435    );
436    $regex = join('|',$types);
437
438    // because a temp file was created already
439    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
440        return array($lang['uploadwrong'],-1);
441    }
442
443    //check for overwrite
444    $overwrite = file_exists($fn);
445    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
446    if($overwrite && (!$ow || $auth < $auth_ow)) {
447        return array($lang['uploadexist'], 0);
448    }
449    // check for valid content
450    $ok = media_contentcheck($file['name'], $file['mime']);
451    if($ok == -1){
452        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
453    }elseif($ok == -2){
454        return array($lang['uploadspam'],-1);
455    }elseif($ok == -3){
456        return array($lang['uploadxss'],-1);
457    }
458
459    // prepare event data
460    $data = array();
461    $data[0] = $file['name'];
462    $data[1] = $fn;
463    $data[2] = $id;
464    $data[3] = $file['mime'];
465    $data[4] = $overwrite;
466    $data[5] = $move;
467
468    // trigger event
469    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
470}
471
472/**
473 * Callback adapter for media_upload_finish() triggered by MEDIA_UPLOAD_FINISH
474 *
475 * @author Michael Klier <chi@chimeric.de>
476 *
477 * @param array $data event data
478 * @return false|array|string
479 */
480function _media_upload_action($data) {
481    // fixme do further sanity tests of given data?
482    if(is_array($data) && count($data)===6) {
483        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
484    } else {
485        return false; //callback error
486    }
487}
488
489/**
490 * Saves an uploaded media file
491 *
492 * @author Andreas Gohr <andi@splitbrain.org>
493 * @author Michael Klier <chi@chimeric.de>
494 * @author Kate Arzamastseva <pshns@ukr.net>
495 *
496 * @param string $fn_tmp
497 * @param string $fn
498 * @param string $id        media id
499 * @param string $imime     mime type
500 * @param bool   $overwrite overwrite existing?
501 * @param string $move      function name
502 * @return array|string
503 */
504function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
505    global $conf;
506    global $lang;
507    global $REV;
508
509    $old = @filemtime($fn);
510    if(!file_exists(mediaFN($id, $old)) && file_exists($fn)) {
511        // add old revision to the attic if missing
512        media_saveOldRevision($id);
513    }
514
515    // prepare directory
516    io_createNamespace($id, 'media');
517
518    $filesize_old = file_exists($fn) ? filesize($fn) : 0;
519
520    if($move($fn_tmp, $fn)) {
521        @clearstatcache(true,$fn);
522        $new = @filemtime($fn);
523        // Set the correct permission here.
524        // Always chmod media because they may be saved with different permissions than expected from the php umask.
525        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
526        chmod($fn, $conf['fmode']);
527        msg($lang['uploadsucc'],1);
528        media_notify($id,$fn,$imime,$old);
529        // add a log entry to the media changelog
530        $filesize_new = filesize($fn);
531        $sizechange = $filesize_new - $filesize_old;
532        if($REV) {
533            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_REVERT, sprintf($lang['restored'], dformat($REV)), $REV, null, $sizechange);
534        } elseif($overwrite) {
535            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
536        } else {
537            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
538        }
539        return $id;
540    }else{
541        return array($lang['uploadfail'],-1);
542    }
543}
544
545/**
546 * Moves the current version of media file to the media_attic
547 * directory
548 *
549 * @author Kate Arzamastseva <pshns@ukr.net>
550 *
551 * @param string $id
552 * @return int - revision date
553 */
554function media_saveOldRevision($id){
555    global $conf, $lang;
556
557    $oldf = mediaFN($id);
558    if(!file_exists($oldf)) return '';
559    $date = filemtime($oldf);
560    if (!$conf['mediarevisions']) return $date;
561
562    $medialog = new MediaChangeLog($id);
563    if (!$medialog->getRevisionInfo($date)) {
564        // there was an external edit,
565        // there is no log entry for current version of file
566        $sizechange = filesize($oldf);
567        if(!file_exists(mediaMetaFN($id, '.changes'))) {
568            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
569        } else {
570            $oldRev = $medialog->getRevisions(-1, 1); // from changelog
571            $oldRev = (int) (empty($oldRev) ? 0 : $oldRev[0]);
572            $filesize_old = filesize(mediaFN($id, $oldRev));
573            $sizechange = $sizechange - $filesize_old;
574
575            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
576        }
577    }
578
579    $newf = mediaFN($id,$date);
580    io_makeFileDir($newf);
581    if(copy($oldf, $newf)) {
582        // Set the correct permission here.
583        // Always chmod media because they may be saved with different permissions than expected from the php umask.
584        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
585        chmod($newf, $conf['fmode']);
586    }
587    return $date;
588}
589
590/**
591 * This function checks if the uploaded content is really what the
592 * mimetype says it is. We also do spam checking for text types here.
593 *
594 * We need to do this stuff because we can not rely on the browser
595 * to do this check correctly. Yes, IE is broken as usual.
596 *
597 * @author Andreas Gohr <andi@splitbrain.org>
598 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
599 * @fixme  check all 26 magic IE filetypes here?
600 *
601 * @param string $file path to file
602 * @param string $mime mimetype
603 * @return int
604 */
605function media_contentcheck($file,$mime){
606    global $conf;
607    if($conf['iexssprotect']){
608        $fh = @fopen($file, 'rb');
609        if($fh){
610            $bytes = fread($fh, 256);
611            fclose($fh);
612            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
613                return -3; //XSS: possibly malicious content
614            }
615        }
616    }
617    if(substr($mime,0,6) == 'image/'){
618        $info = @getimagesize($file);
619        if($mime == 'image/gif' && $info[2] != 1){
620            return -1; // uploaded content did not match the file extension
621        }elseif($mime == 'image/jpeg' && $info[2] != 2){
622            return -1;
623        }elseif($mime == 'image/png' && $info[2] != 3){
624            return -1;
625        }
626        # fixme maybe check other images types as well
627    }elseif(substr($mime,0,5) == 'text/'){
628        global $TEXT;
629        $TEXT = io_readFile($file);
630        if(checkwordblock()){
631            return -2; //blocked by the spam blacklist
632        }
633    }
634    return 0;
635}
636
637/**
638 * Send a notify mail on uploads
639 *
640 * @author Andreas Gohr <andi@splitbrain.org>
641 *
642 * @param string   $id      media id
643 * @param string   $file    path to file
644 * @param string   $mime    mime type
645 * @param bool|int $old_rev revision timestamp or false
646 * @return bool
647 */
648function media_notify($id,$file,$mime,$old_rev=false){
649    global $conf;
650    if(empty($conf['notify'])) return false; //notify enabled?
651
652    $subscription = new Subscription();
653    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
654}
655
656/**
657 * List all files in a given Media namespace
658 *
659 * @param string      $ns             namespace
660 * @param null|int    $auth           permission level
661 * @param string      $jump           id
662 * @param bool        $fullscreenview
663 * @param bool|string $sort           sorting order, false skips sorting
664 */
665function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
666    global $conf;
667    global $lang;
668    $ns = cleanID($ns);
669
670    // check auth our self if not given (needed for ajax calls)
671    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
672
673    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
674
675    if($auth < AUTH_READ){
676        // FIXME: print permission warning here instead?
677        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
678    }else{
679        if (!$fullscreenview) {
680            media_uploadform($ns, $auth);
681            media_searchform($ns);
682        }
683
684        $dir = utf8_encodeFN(str_replace(':','/',$ns));
685        $data = array();
686        search($data,$conf['mediadir'],'search_media',
687                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
688
689        if(!count($data)){
690            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
691        }else {
692            if ($fullscreenview) {
693                echo '<ul class="' . _media_get_list_type() . '">';
694            }
695            foreach($data as $item){
696                if (!$fullscreenview) {
697                    media_printfile($item,$auth,$jump);
698                } else {
699                    media_printfile_thumbs($item,$auth,$jump);
700                }
701            }
702            if ($fullscreenview) echo '</ul>'.NL;
703        }
704    }
705}
706
707/**
708 * Prints tabs for files list actions
709 *
710 * @author Kate Arzamastseva <pshns@ukr.net>
711 * @author Adrian Lang <mail@adrianlang.de>
712 *
713 * @param string $selected_tab - opened tab
714 */
715
716function media_tabs_files($selected_tab = ''){
717    global $lang;
718    $tabs = array();
719    foreach(array('files'  => 'mediaselect',
720                  'upload' => 'media_uploadtab',
721                  'search' => 'media_searchtab') as $tab => $caption) {
722        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
723                            'caption' => $lang[$caption]);
724    }
725
726    html_tabs($tabs, $selected_tab);
727}
728
729/**
730 * Prints tabs for files details actions
731 *
732 * @author Kate Arzamastseva <pshns@ukr.net>
733 * @param string $image filename of the current image
734 * @param string $selected_tab opened tab
735 */
736function media_tabs_details($image, $selected_tab = ''){
737    global $lang, $conf;
738
739    $tabs = array();
740    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
741                          'caption' => $lang['media_viewtab']);
742
743    list(, $mime) = mimetype($image);
744    if ($mime == 'image/jpeg' && file_exists(mediaFN($image))) {
745        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
746                              'caption' => $lang['media_edittab']);
747    }
748    if ($conf['mediarevisions']) {
749        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
750                                 'caption' => $lang['media_historytab']);
751    }
752
753    html_tabs($tabs, $selected_tab);
754}
755
756/**
757 * Prints options for the tab that displays a list of all files
758 *
759 * @author Kate Arzamastseva <pshns@ukr.net>
760 */
761function media_tab_files_options(){
762    global $lang;
763    global $INPUT;
764    global $ID;
765    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
766                                'action' => wl($ID)));
767    $media_manager_params = media_managerURL(array(), '', false, true);
768    foreach($media_manager_params as $pKey => $pVal){
769        $form->addHidden($pKey, $pVal);
770    }
771    $form->addHidden('sectok', null);
772    if ($INPUT->has('q')) {
773        $form->addHidden('q', $INPUT->str('q'));
774    }
775    $form->addElement('<ul>'.NL);
776    foreach(array('list' => array('listType', array('thumbs', 'rows')),
777                  'sort' => array('sortBy', array('name', 'date')))
778            as $group => $content) {
779        $checked = "_media_get_${group}_type";
780        $checked = $checked();
781
782        $form->addElement('<li class="' . $content[0] . '">');
783        foreach($content[1] as $option) {
784            $attrs = array();
785            if ($checked == $option) {
786                $attrs['checked'] = 'checked';
787            }
788            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
789                                       $lang['media_' . $group . '_' . $option],
790                                                  $content[0] . '__' . $option,
791                                                  $option, $attrs));
792        }
793        $form->addElement('</li>'.NL);
794    }
795    $form->addElement('<li>');
796    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
797    $form->addElement('</li>'.NL);
798    $form->addElement('</ul>'.NL);
799    $form->printForm();
800}
801
802/**
803 * Returns type of sorting for the list of files in media manager
804 *
805 * @author Kate Arzamastseva <pshns@ukr.net>
806 *
807 * @return string - sort type
808 */
809function _media_get_sort_type() {
810    return _media_get_display_param('sort', array('default' => 'name', 'date'));
811}
812
813/**
814 * Returns type of listing for the list of files in media manager
815 *
816 * @author Kate Arzamastseva <pshns@ukr.net>
817 *
818 * @return string - list type
819 */
820function _media_get_list_type() {
821    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
822}
823
824/**
825 * Get display parameters
826 *
827 * @param string $param   name of parameter
828 * @param array  $values  allowed values, where default value has index key 'default'
829 * @return string the parameter value
830 */
831function _media_get_display_param($param, $values) {
832    global $INPUT;
833    if (in_array($INPUT->str($param), $values)) {
834        // FIXME: Set cookie
835        return $INPUT->str($param);
836    } else {
837        $val = get_doku_pref($param, $values['default']);
838        if (!in_array($val, $values)) {
839            $val = $values['default'];
840        }
841        return $val;
842    }
843}
844
845/**
846 * Prints tab that displays a list of all files
847 *
848 * @author Kate Arzamastseva <pshns@ukr.net>
849 *
850 * @param string    $ns
851 * @param null|int  $auth permission level
852 * @param string    $jump item id
853 */
854function media_tab_files($ns,$auth=null,$jump='') {
855    global $lang;
856    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
857
858    if($auth < AUTH_READ){
859        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
860    }else{
861        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
862    }
863}
864
865/**
866 * Prints tab that displays uploading form
867 *
868 * @author Kate Arzamastseva <pshns@ukr.net>
869 *
870 * @param string   $ns
871 * @param null|int $auth permission level
872 * @param string   $jump item id
873 */
874function media_tab_upload($ns,$auth=null,$jump='') {
875    global $lang;
876    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
877
878    echo '<div class="upload">'.NL;
879    if ($auth >= AUTH_UPLOAD) {
880        echo '<p>' . $lang['mediaupload'] . '</p>';
881    }
882    media_uploadform($ns, $auth, true);
883    echo '</div>'.NL;
884}
885
886/**
887 * Prints tab that displays search form
888 *
889 * @author Kate Arzamastseva <pshns@ukr.net>
890 *
891 * @param string $ns
892 * @param null|int $auth permission level
893 */
894function media_tab_search($ns,$auth=null) {
895    global $INPUT;
896
897    $do = $INPUT->str('mediado');
898    $query = $INPUT->str('q');
899    echo '<div class="search">'.NL;
900
901    media_searchform($ns, $query, true);
902    if ($do == 'searchlist' || $query) {
903        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
904    }
905    echo '</div>'.NL;
906}
907
908/**
909 * Prints tab that displays mediafile details
910 *
911 * @author Kate Arzamastseva <pshns@ukr.net>
912 *
913 * @param string     $image media id
914 * @param string     $ns
915 * @param null|int   $auth  permission level
916 * @param string|int $rev   revision timestamp or empty string
917 */
918function media_tab_view($image, $ns, $auth=null, $rev='') {
919    global $lang;
920    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
921
922    if ($image && $auth >= AUTH_READ) {
923        $meta = new JpegMeta(mediaFN($image, $rev));
924        media_preview($image, $auth, $rev, $meta);
925        media_preview_buttons($image, $auth, $rev);
926        media_details($image, $auth, $rev, $meta);
927
928    } else {
929        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
930    }
931}
932
933/**
934 * Prints tab that displays form for editing mediafile metadata
935 *
936 * @author Kate Arzamastseva <pshns@ukr.net>
937 *
938 * @param string     $image media id
939 * @param string     $ns
940 * @param null|int   $auth permission level
941 */
942function media_tab_edit($image, $ns, $auth=null) {
943    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
944
945    if ($image) {
946        list(, $mime) = mimetype($image);
947        if ($mime == 'image/jpeg') media_metaform($image,$auth);
948    }
949}
950
951/**
952 * Prints tab that displays mediafile revisions
953 *
954 * @author Kate Arzamastseva <pshns@ukr.net>
955 *
956 * @param string     $image media id
957 * @param string     $ns
958 * @param null|int   $auth permission level
959 */
960function media_tab_history($image, $ns, $auth=null) {
961    global $lang;
962    global $INPUT;
963
964    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
965    $do = $INPUT->str('mediado');
966
967    if ($auth >= AUTH_READ && $image) {
968        if ($do == 'diff'){
969            media_diff($image, $ns, $auth);
970        } else {
971            $first = $INPUT->int('first');
972            html_revisions($first, $image);
973        }
974    } else {
975        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
976    }
977}
978
979/**
980 * Prints mediafile details
981 *
982 * @param string         $image media id
983 * @param int            $auth permission level
984 * @param int|string     $rev revision timestamp or empty string
985 * @param JpegMeta|bool  $meta
986 *
987 * @author Kate Arzamastseva <pshns@ukr.net>
988 */
989function media_preview($image, $auth, $rev='', $meta=false) {
990
991    $size = media_image_preview_size($image, $rev, $meta);
992
993    if ($size) {
994        global $lang;
995        echo '<div class="image">';
996
997        $more = array();
998        if ($rev) {
999            $more['rev'] = $rev;
1000        } else {
1001            $t = @filemtime(mediaFN($image));
1002            $more['t'] = $t;
1003        }
1004
1005        $more['w'] = $size[0];
1006        $more['h'] = $size[1];
1007        $src = ml($image, $more);
1008
1009        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
1010        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
1011        echo '</a>';
1012
1013        echo '</div>'.NL;
1014    }
1015}
1016
1017/**
1018 * Prints mediafile action buttons
1019 *
1020 * @author Kate Arzamastseva <pshns@ukr.net>
1021 *
1022 * @param string     $image media id
1023 * @param int        $auth  permission level
1024 * @param string|int $rev   revision timestamp, or empty string
1025 */
1026function media_preview_buttons($image, $auth, $rev='') {
1027    global $lang, $conf;
1028
1029    echo '<ul class="actions">'.NL;
1030
1031    if($auth >= AUTH_DELETE && !$rev && file_exists(mediaFN($image))){
1032
1033        // delete button
1034        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
1035            'action'=>media_managerURL(array('delete' => $image), '&')));
1036        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
1037        echo '<li>';
1038        $form->printForm();
1039        echo '</li>'.NL;
1040    }
1041
1042    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1043    if($auth >= $auth_ow && !$rev){
1044
1045        // upload new version button
1046        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
1047            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
1048        $form->addElement(form_makeButton('submit','',$lang['media_update']));
1049        echo '<li>';
1050        $form->printForm();
1051        echo '</li>'.NL;
1052    }
1053
1054    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && file_exists(mediaFN($image, $rev))){
1055
1056        // restore button
1057        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
1058            'action'=>media_managerURL(array('image' => $image), '&')));
1059        $form->addHidden('mediado','restore');
1060        $form->addHidden('rev',$rev);
1061        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
1062        echo '<li>';
1063        $form->printForm();
1064        echo '</li>'.NL;
1065    }
1066
1067    echo '</ul>'.NL;
1068}
1069
1070/**
1071 * Returns image width and height for mediamanager preview panel
1072 *
1073 * @author Kate Arzamastseva <pshns@ukr.net>
1074 * @param string         $image
1075 * @param int|string     $rev
1076 * @param JpegMeta|bool  $meta
1077 * @param int            $size
1078 * @return array|false
1079 */
1080function media_image_preview_size($image, $rev, $meta, $size = 500) {
1081    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
1082
1083    $info = getimagesize(mediaFN($image, $rev));
1084    $w = (int) $info[0];
1085    $h = (int) $info[1];
1086
1087    if($meta && ($w > $size || $h > $size)){
1088        $ratio = $meta->getResizeRatio($size, $size);
1089        $w = floor($w * $ratio);
1090        $h = floor($h * $ratio);
1091    }
1092    return array($w, $h);
1093}
1094
1095/**
1096 * Returns the requested EXIF/IPTC tag from the image meta
1097 *
1098 * @author Kate Arzamastseva <pshns@ukr.net>
1099 *
1100 * @param array    $tags array with tags, first existing is returned
1101 * @param JpegMeta $meta
1102 * @param string   $alt  alternative value
1103 * @return string
1104 */
1105function media_getTag($tags,$meta,$alt=''){
1106    if($meta === false) return $alt;
1107    $info = $meta->getField($tags);
1108    if($info == false) return $alt;
1109    return $info;
1110}
1111
1112/**
1113 * Returns mediafile tags
1114 *
1115 * @author Kate Arzamastseva <pshns@ukr.net>
1116 *
1117 * @param JpegMeta $meta
1118 * @return array list of tags of the mediafile
1119 */
1120function media_file_tags($meta) {
1121    // load the field descriptions
1122    static $fields = null;
1123    if(is_null($fields)){
1124        $config_files = getConfigFiles('mediameta');
1125        foreach ($config_files as $config_file) {
1126            if(file_exists($config_file)) include($config_file);
1127        }
1128    }
1129
1130    $tags = array();
1131
1132    foreach($fields as $key => $tag){
1133        $t = array();
1134        if (!empty($tag[0])) $t = array($tag[0]);
1135        if(isset($tag[3]) && is_array($tag[3])) $t = array_merge($t,$tag[3]);
1136        $value = media_getTag($t, $meta);
1137        $tags[] = array('tag' => $tag, 'value' => $value);
1138    }
1139
1140    return $tags;
1141}
1142
1143/**
1144 * Prints mediafile tags
1145 *
1146 * @author Kate Arzamastseva <pshns@ukr.net>
1147 *
1148 * @param string        $image image id
1149 * @param int           $auth  permission level
1150 * @param string|int    $rev   revision timestamp, or empty string
1151 * @param bool|JpegMeta $meta  image object, or create one if false
1152 */
1153function media_details($image, $auth, $rev='', $meta=false) {
1154    global $lang;
1155
1156    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1157    $tags = media_file_tags($meta);
1158
1159    echo '<dl>'.NL;
1160    foreach($tags as $tag){
1161        if ($tag['value']) {
1162            $value = cleanText($tag['value']);
1163            echo '<dt>'.$lang[$tag['tag'][1]].'</dt><dd>';
1164            if ($tag['tag'][2] == 'date') echo dformat($value);
1165            else echo hsc($value);
1166            echo '</dd>'.NL;
1167        }
1168    }
1169    echo '</dl>'.NL;
1170    echo '<dl>'.NL;
1171    echo '<dt>'.$lang['reference'].':</dt>';
1172    $media_usage = ft_mediause($image,true);
1173    if(count($media_usage) > 0){
1174        foreach($media_usage as $path){
1175            echo '<dd>'.html_wikilink($path).'</dd>';
1176        }
1177    }else{
1178        echo '<dd>'.$lang['nothingfound'].'</dd>';
1179    }
1180    echo '</dl>'.NL;
1181
1182}
1183
1184/**
1185 * Shows difference between two revisions of file
1186 *
1187 * @author Kate Arzamastseva <pshns@ukr.net>
1188 *
1189 * @param string $image  image id
1190 * @param string $ns
1191 * @param int $auth permission level
1192 * @param bool $fromajax
1193 * @return false|null|string
1194 */
1195function media_diff($image, $ns, $auth, $fromajax = false) {
1196    global $conf;
1197    global $INPUT;
1198
1199    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1200
1201    $rev1 = $INPUT->int('rev');
1202
1203    $rev2 = $INPUT->ref('rev2');
1204    if(is_array($rev2)){
1205        $rev1 = (int) $rev2[0];
1206        $rev2 = (int) $rev2[1];
1207
1208        if(!$rev1){
1209            $rev1 = $rev2;
1210            unset($rev2);
1211        }
1212    }else{
1213        $rev2 = $INPUT->int('rev2');
1214    }
1215
1216    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1217    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1218
1219    if($rev1 && $rev2){            // two specific revisions wanted
1220        // make sure order is correct (older on the left)
1221        if($rev1 < $rev2){
1222            $l_rev = $rev1;
1223            $r_rev = $rev2;
1224        }else{
1225            $l_rev = $rev2;
1226            $r_rev = $rev1;
1227        }
1228    }elseif($rev1){                // single revision given, compare to current
1229        $r_rev = '';
1230        $l_rev = $rev1;
1231    }else{                        // no revision was given, compare previous to current
1232        $r_rev = '';
1233        $medialog = new MediaChangeLog($image);
1234        $revs = $medialog->getRevisions(0, 1);
1235        if (file_exists(mediaFN($image, $revs[0]))) {
1236            $l_rev = $revs[0];
1237        } else {
1238            $l_rev = '';
1239        }
1240    }
1241
1242    // prepare event data
1243    $data = array();
1244    $data[0] = $image;
1245    $data[1] = $l_rev;
1246    $data[2] = $r_rev;
1247    $data[3] = $ns;
1248    $data[4] = $auth;
1249    $data[5] = $fromajax;
1250
1251    // trigger event
1252    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1253}
1254
1255/**
1256 * Callback for media file diff
1257 *
1258 * @param array $data event data
1259 * @return false|null
1260 */
1261function _media_file_diff($data) {
1262    if(is_array($data) && count($data)===6) {
1263        media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1264    } else {
1265        return false;
1266    }
1267}
1268
1269/**
1270 * Shows difference between two revisions of image
1271 *
1272 * @author Kate Arzamastseva <pshns@ukr.net>
1273 *
1274 * @param string $image
1275 * @param string|int $l_rev revision timestamp, or empty string
1276 * @param string|int $r_rev revision timestamp, or empty string
1277 * @param string $ns
1278 * @param int $auth permission level
1279 * @param bool $fromajax
1280 */
1281function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1282    global $lang;
1283    global $INPUT;
1284
1285    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1286    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1287
1288    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1289    if ($is_img) {
1290        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1291        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1292        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1293
1294        $difftype = $INPUT->str('difftype');
1295
1296        if (!$fromajax) {
1297            $form = new Doku_Form(array(
1298                'action' => media_managerURL(array(), '&'),
1299                'method' => 'get',
1300                'id' => 'mediamanager__form_diffview',
1301                'class' => 'diffView'
1302            ));
1303            $form->addHidden('sectok', null);
1304            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1305            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1306            $form->addHidden('mediado', 'diff');
1307            $form->printForm();
1308
1309            echo NL.'<div id="mediamanager__diff" >'.NL;
1310        }
1311
1312        if ($difftype == 'opacity' || $difftype == 'portions') {
1313            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1314            if (!$fromajax) echo '</div>';
1315            return;
1316        }
1317    }
1318
1319    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1320
1321    ?>
1322    <div class="table">
1323    <table>
1324      <tr>
1325        <th><?php echo $l_head; ?></th>
1326        <th><?php echo $r_head; ?></th>
1327      </tr>
1328    <?php
1329
1330    echo '<tr class="image">';
1331    echo '<td>';
1332    media_preview($image, $auth, $l_rev, $l_meta);
1333    echo '</td>';
1334
1335    echo '<td>';
1336    media_preview($image, $auth, $r_rev, $r_meta);
1337    echo '</td>';
1338    echo '</tr>'.NL;
1339
1340    echo '<tr class="actions">';
1341    echo '<td>';
1342    media_preview_buttons($image, $auth, $l_rev);
1343    echo '</td>';
1344
1345    echo '<td>';
1346    media_preview_buttons($image, $auth, $r_rev);
1347    echo '</td>';
1348    echo '</tr>'.NL;
1349
1350    $l_tags = media_file_tags($l_meta);
1351    $r_tags = media_file_tags($r_meta);
1352    // FIXME r_tags-only stuff
1353    foreach ($l_tags as $key => $l_tag) {
1354        if ($l_tag['value'] != $r_tags[$key]['value']) {
1355            $r_tags[$key]['highlighted'] = true;
1356            $l_tags[$key]['highlighted'] = true;
1357        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1358            unset($r_tags[$key]);
1359            unset($l_tags[$key]);
1360        }
1361    }
1362
1363    echo '<tr>';
1364    foreach(array($l_tags,$r_tags) as $tags){
1365        echo '<td>'.NL;
1366
1367        echo '<dl class="img_tags">';
1368        foreach($tags as $tag){
1369            $value = cleanText($tag['value']);
1370            if (!$value) $value = '-';
1371            echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
1372            echo '<dd>';
1373            if ($tag['highlighted']) {
1374                echo '<strong>';
1375            }
1376            if ($tag['tag'][2] == 'date') echo dformat($value);
1377            else echo hsc($value);
1378            if ($tag['highlighted']) {
1379                echo '</strong>';
1380            }
1381            echo '</dd>';
1382        }
1383        echo '</dl>'.NL;
1384
1385        echo '</td>';
1386    }
1387    echo '</tr>'.NL;
1388
1389    echo '</table>'.NL;
1390    echo '</div>'.NL;
1391
1392    if ($is_img && !$fromajax) echo '</div>';
1393}
1394
1395/**
1396 * Prints two images side by side
1397 * and slider
1398 *
1399 * @author Kate Arzamastseva <pshns@ukr.net>
1400 *
1401 * @param string $image   image id
1402 * @param int    $l_rev   revision timestamp, or empty string
1403 * @param int    $r_rev   revision timestamp, or empty string
1404 * @param array  $l_size  array with width and height
1405 * @param array  $r_size  array with width and height
1406 * @param string $type
1407 */
1408function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1409    if ($l_size != $r_size) {
1410        if ($r_size[0] > $l_size[0]) {
1411            $l_size = $r_size;
1412        }
1413    }
1414
1415    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1416    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1417
1418    $l_src = ml($image, $l_more);
1419    $r_src = ml($image, $r_more);
1420
1421    // slider
1422    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1423
1424    // two images in divs
1425    echo '<div class="imageDiff ' . $type . '">'.NL;
1426    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1427    echo '<img src="'.$l_src.'" alt="" />';
1428    echo '</div>'.NL;
1429    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1430    echo '<img src="'.$r_src.'" alt="" />';
1431    echo '</div>'.NL;
1432    echo '</div>'.NL;
1433}
1434
1435/**
1436 * Restores an old revision of a media file
1437 *
1438 * @param string $image media id
1439 * @param int    $rev   revision timestamp or empty string
1440 * @param int    $auth
1441 * @return string - file's id
1442 *
1443 * @author Kate Arzamastseva <pshns@ukr.net>
1444 */
1445function media_restore($image, $rev, $auth){
1446    global $conf;
1447    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1448    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1449    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1450    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1451    list(,$imime,) = mimetype($image);
1452    $res = media_upload_finish(mediaFN($image, $rev),
1453        mediaFN($image),
1454        $image,
1455        $imime,
1456        true,
1457        'copy');
1458    if (is_array($res)) {
1459        msg($res[0], $res[1]);
1460        return false;
1461    }
1462    return $res;
1463}
1464
1465/**
1466 * List all files found by the search request
1467 *
1468 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1469 * @author Andreas Gohr <gohr@cosmocode.de>
1470 * @author Kate Arzamastseva <pshns@ukr.net>
1471 * @triggers MEDIA_SEARCH
1472 *
1473 * @param string $query
1474 * @param string $ns
1475 * @param null|int $auth
1476 * @param bool $fullscreen
1477 * @param string $sort
1478 */
1479function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1480    global $conf;
1481    global $lang;
1482
1483    $ns = cleanID($ns);
1484    $evdata = array(
1485        'ns'    => $ns,
1486        'data'  => array(),
1487        'query' => $query
1488    );
1489    if (!blank($query)) {
1490        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1491        if ($evt->advise_before()) {
1492            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1493            $quoted = preg_quote($evdata['query'],'/');
1494            //apply globbing
1495            $quoted = str_replace(array('\*', '\?'), array('.*', '.'), $quoted, $count);
1496
1497            //if we use globbing file name must match entirely but may be preceded by arbitrary namespace
1498            if ($count > 0) $quoted = '^([^:]*:)*'.$quoted.'$';
1499
1500            $pattern = '/'.$quoted.'/i';
1501            search($evdata['data'],
1502                    $conf['mediadir'],
1503                    'search_media',
1504                    array('showmsg'=>false,'pattern'=>$pattern),
1505                    $dir,
1506                    1,
1507                    $sort);
1508        }
1509        $evt->advise_after();
1510        unset($evt);
1511    }
1512
1513    if (!$fullscreen) {
1514        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1515        media_searchform($ns,$query);
1516    }
1517
1518    if(!count($evdata['data'])){
1519        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1520    }else {
1521        if ($fullscreen) {
1522            echo '<ul class="' . _media_get_list_type() . '">';
1523        }
1524        foreach($evdata['data'] as $item){
1525            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1526            else media_printfile_thumbs($item,$item['perm'],false,true);
1527        }
1528        if ($fullscreen) echo '</ul>'.NL;
1529    }
1530}
1531
1532/**
1533 * Formats and prints one file in the list
1534 *
1535 * @param array     $item
1536 * @param int       $auth              permission level
1537 * @param string    $jump              item id
1538 * @param bool      $display_namespace
1539 */
1540function media_printfile($item,$auth,$jump,$display_namespace=false){
1541    global $lang;
1542
1543    // Prepare zebra coloring
1544    // I always wanted to use this variable name :-D
1545    static $twibble = 1;
1546    $twibble *= -1;
1547    $zebra = ($twibble == -1) ? 'odd' : 'even';
1548
1549    // Automatically jump to recent action
1550    if($jump == $item['id']) {
1551        $jump = ' id="scroll__here" ';
1552    }else{
1553        $jump = '';
1554    }
1555
1556    // Prepare fileicons
1557    list($ext) = mimetype($item['file'],false);
1558    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1559    $class = 'select mediafile mf_'.$class;
1560
1561    // Prepare filename
1562    $file = utf8_decodeFN($item['file']);
1563
1564    // Prepare info
1565    $info = '';
1566    if($item['isimg']){
1567        $info .= (int) $item['meta']->getField('File.Width');
1568        $info .= '&#215;';
1569        $info .= (int) $item['meta']->getField('File.Height');
1570        $info .= ' ';
1571    }
1572    $info .= '<i>'.dformat($item['mtime']).'</i>';
1573    $info .= ' ';
1574    $info .= filesize_h($item['size']);
1575
1576    // output
1577    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1578    if (!$display_namespace) {
1579        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1580    } else {
1581        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1582    }
1583    echo '<span class="info">('.$info.')</span>'.NL;
1584
1585    // view button
1586    $link = ml($item['id'],'',true);
1587    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1588        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1589
1590    // mediamanager button
1591    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1592    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1593        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1594
1595    // delete button
1596    if($item['writable'] && $auth >= AUTH_DELETE){
1597        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1598            '&amp;sectok='.getSecurityToken();
1599        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1600            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1601            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1602    }
1603
1604    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1605    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1606    echo '</div>';
1607    if($item['isimg']) media_printimgdetail($item);
1608    echo '<div class="clearer"></div>'.NL;
1609    echo '</div>'.NL;
1610}
1611
1612/**
1613 * Display a media icon
1614 *
1615 * @param string $filename media id
1616 * @param string $size     the size subfolder, if not specified 16x16 is used
1617 * @return string html
1618 */
1619function media_printicon($filename, $size=''){
1620    list($ext) = mimetype(mediaFN($filename),false);
1621
1622    if (file_exists(DOKU_INC.'lib/images/fileicons/'.$size.'/'.$ext.'.png')) {
1623        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/'.$ext.'.png';
1624    } else {
1625        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/file.png';
1626    }
1627
1628    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1629}
1630
1631/**
1632 * Formats and prints one file in the list in the thumbnails view
1633 *
1634 * @author Kate Arzamastseva <pshns@ukr.net>
1635 *
1636 * @param array       $item
1637 * @param int         $auth              permission level
1638 * @param bool|string $jump              item id
1639 * @param bool        $display_namespace
1640 */
1641function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1642
1643    // Prepare filename
1644    $file = utf8_decodeFN($item['file']);
1645
1646    // output
1647    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1648
1649        echo '<dt>';
1650    if($item['isimg']) {
1651        media_printimgdetail($item, true);
1652
1653    } else {
1654        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1655            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1656            'tab_details' => 'view')).'">';
1657        echo media_printicon($item['id'], '32x32');
1658        echo '</a>';
1659    }
1660    echo '</dt>'.NL;
1661    if (!$display_namespace) {
1662        $name = hsc($file);
1663    } else {
1664        $name = hsc($item['id']);
1665    }
1666    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1667        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1668
1669    if($item['isimg']){
1670        $size = '';
1671        $size .= (int) $item['meta']->getField('File.Width');
1672        $size .= '&#215;';
1673        $size .= (int) $item['meta']->getField('File.Height');
1674        echo '<dd class="size">'.$size.'</dd>'.NL;
1675    } else {
1676        echo '<dd class="size">&#160;</dd>'.NL;
1677    }
1678    $date = dformat($item['mtime']);
1679    echo '<dd class="date">'.$date.'</dd>'.NL;
1680    $filesize = filesize_h($item['size']);
1681    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1682    echo '</dl></li>'.NL;
1683}
1684
1685/**
1686 * Prints a thumbnail and metainfo
1687 *
1688 * @param array $item
1689 * @param bool  $fullscreen
1690 */
1691function media_printimgdetail($item, $fullscreen=false){
1692    // prepare thumbnail
1693    $size = $fullscreen ? 90 : 120;
1694
1695    $w = (int) $item['meta']->getField('File.Width');
1696    $h = (int) $item['meta']->getField('File.Height');
1697    if($w>$size || $h>$size){
1698        if (!$fullscreen) {
1699            $ratio = $item['meta']->getResizeRatio($size);
1700        } else {
1701            $ratio = $item['meta']->getResizeRatio($size,$size);
1702        }
1703        $w = floor($w * $ratio);
1704        $h = floor($h * $ratio);
1705    }
1706    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1707    $p = array();
1708    if (!$fullscreen) {
1709        // In fullscreen mediamanager view, image resizing is done via CSS.
1710        $p['width']  = $w;
1711        $p['height'] = $h;
1712    }
1713    $p['alt']    = $item['id'];
1714    $att = buildAttributes($p);
1715
1716    // output
1717    if ($fullscreen) {
1718        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1719            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view')).'">';
1720        echo '<img src="'.$src.'" '.$att.' />';
1721        echo '</a>';
1722    }
1723
1724    if ($fullscreen) return;
1725
1726    echo '<div class="detail">';
1727    echo '<div class="thumb">';
1728    echo '<a id="d_:'.$item['id'].'" class="select">';
1729    echo '<img src="'.$src.'" '.$att.' />';
1730    echo '</a>';
1731    echo '</div>';
1732
1733    // read EXIF/IPTC data
1734    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1735    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1736                'EXIF.TIFFImageDescription',
1737                'EXIF.TIFFUserComment'));
1738    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1739    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1740
1741    // print EXIF/IPTC data
1742    if($t || $d || $k ){
1743        echo '<p>';
1744        if($t) echo '<strong>'.hsc($t).'</strong><br />';
1745        if($d) echo hsc($d).'<br />';
1746        if($t) echo '<em>'.hsc($k).'</em>';
1747        echo '</p>';
1748    }
1749    echo '</div>';
1750}
1751
1752/**
1753 * Build link based on the current, adding/rewriting parameters
1754 *
1755 * @author Kate Arzamastseva <pshns@ukr.net>
1756 *
1757 * @param array|bool $params
1758 * @param string     $amp           separator
1759 * @param bool       $abs           absolute url?
1760 * @param bool       $params_array  return the parmeters array?
1761 * @return string|array - link or link parameters
1762 */
1763function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1764    global $ID;
1765    global $INPUT;
1766
1767    $gets = array('do' => 'media');
1768    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1769    foreach ($media_manager_params as $x) {
1770        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1771    }
1772
1773    if ($params) {
1774        $gets = $params + $gets;
1775    }
1776    unset($gets['id']);
1777    if (isset($gets['delete'])) {
1778        unset($gets['image']);
1779        unset($gets['tab_details']);
1780    }
1781
1782    if ($params_array) return $gets;
1783
1784    return wl($ID,$gets,$abs,$amp);
1785}
1786
1787/**
1788 * Print the media upload form if permissions are correct
1789 *
1790 * @author Andreas Gohr <andi@splitbrain.org>
1791 * @author Kate Arzamastseva <pshns@ukr.net>
1792 *
1793 * @param string $ns
1794 * @param int    $auth permission level
1795 * @param bool  $fullscreen
1796 */
1797function media_uploadform($ns, $auth, $fullscreen = false){
1798    global $lang;
1799    global $conf;
1800    global $INPUT;
1801
1802    if($auth < AUTH_UPLOAD) {
1803        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1804        return;
1805    }
1806    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1807
1808    $update = false;
1809    $id = '';
1810    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1811        $update = true;
1812        $id = cleanID($INPUT->str('image'));
1813    }
1814
1815    // The default HTML upload form
1816    $params = array('id'      => 'dw__upload',
1817                    'enctype' => 'multipart/form-data');
1818    if (!$fullscreen) {
1819        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1820    } else {
1821        $params['action'] = media_managerURL(array('tab_files' => 'files',
1822            'tab_details' => 'view'), '&');
1823    }
1824
1825    $form = new Doku_Form($params);
1826    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1827    $form->addElement(formSecurityToken());
1828    $form->addHidden('ns', hsc($ns));
1829    $form->addElement(form_makeOpenTag('p'));
1830    $form->addElement(form_makeFileField('upload', $lang['txt_upload'], 'upload__file'));
1831    $form->addElement(form_makeCloseTag('p'));
1832    $form->addElement(form_makeOpenTag('p'));
1833    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'], 'upload__name'));
1834    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1835    $form->addElement(form_makeCloseTag('p'));
1836
1837    if($auth >= $auth_ow){
1838        $form->addElement(form_makeOpenTag('p'));
1839        $attrs = array();
1840        if ($update) $attrs['checked'] = 'checked';
1841        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1842        $form->addElement(form_makeCloseTag('p'));
1843    }
1844
1845    echo NL.'<div id="mediamanager__uploader">'.NL;
1846    html_form('upload', $form);
1847
1848    echo '</div>'.NL;
1849
1850    echo '<p class="maxsize">';
1851    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1852    echo '</p>'.NL;
1853
1854}
1855
1856/**
1857 * Returns the size uploaded files may have
1858 *
1859 * This uses a conservative approach using the lowest number found
1860 * in any of the limiting ini settings
1861 *
1862 * @returns int size in bytes
1863 */
1864function media_getuploadsize(){
1865    $okay = 0;
1866
1867    $post = (int) php_to_byte(@ini_get('post_max_size'));
1868    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1869    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1870
1871    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1872    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1873    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1874
1875    return $okay;
1876}
1877
1878/**
1879 * Print the search field form
1880 *
1881 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1882 * @author Kate Arzamastseva <pshns@ukr.net>
1883 *
1884 * @param string $ns
1885 * @param string $query
1886 * @param bool $fullscreen
1887 */
1888function media_searchform($ns,$query='',$fullscreen=false){
1889    global $lang;
1890
1891    // The default HTML search form
1892    $params = array('id' => 'dw__mediasearch');
1893    if (!$fullscreen) {
1894        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1895    } else {
1896        $params['action'] = media_managerURL(array(), '&');
1897    }
1898    $form = new Doku_Form($params);
1899    $form->addHidden('ns', $ns);
1900    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1901
1902    $form->addElement(form_makeOpenTag('p'));
1903    $form->addElement(form_makeTextField('q', $query,$lang['searchmedia'],'','',array('title'=>sprintf($lang['searchmedia_in'],hsc($ns).':*'))));
1904    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1905    $form->addElement(form_makeCloseTag('p'));
1906    html_form('searchmedia', $form);
1907}
1908
1909/**
1910 * Build a tree outline of available media namespaces
1911 *
1912 * @author Andreas Gohr <andi@splitbrain.org>
1913 *
1914 * @param string $ns
1915 */
1916function media_nstree($ns){
1917    global $conf;
1918    global $lang;
1919
1920    // currently selected namespace
1921    $ns  = cleanID($ns);
1922    if(empty($ns)){
1923        global $ID;
1924        $ns = (string)getNS($ID);
1925    }
1926
1927    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1928
1929    $data = array();
1930    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1931
1932    // wrap a list with the root level around the other namespaces
1933    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1934                               'label' => '['.$lang['mediaroot'].']'));
1935
1936    // insert the current ns into the hierarchy if it isn't already part of it
1937    $ns_parts = explode(':', $ns);
1938    $tmp_ns = '';
1939    $pos = 0;
1940    foreach ($ns_parts as $level => $part) {
1941        if ($tmp_ns) $tmp_ns .= ':'.$part;
1942        else $tmp_ns = $part;
1943
1944        // find the namespace parts or insert them
1945        while ($data[$pos]['id'] != $tmp_ns) {
1946            if ($pos >= count($data) || ($data[$pos]['level'] <= $level+1 && strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0)) {
1947                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1948                break;
1949            }
1950            ++$pos;
1951        }
1952    }
1953
1954    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1955}
1956
1957/**
1958 * Userfunction for html_buildlist
1959 *
1960 * Prints a media namespace tree item
1961 *
1962 * @author Andreas Gohr <andi@splitbrain.org>
1963 *
1964 * @param array $item
1965 * @return string html
1966 */
1967function media_nstree_item($item){
1968    global $INPUT;
1969    $pos   = strrpos($item['id'], ':');
1970    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
1971    if(empty($item['label'])) $item['label'] = $label;
1972
1973    $ret  = '';
1974    if (!($INPUT->str('do') == 'media'))
1975    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
1976    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
1977        .'" class="idx_dir">';
1978    $ret .= $item['label'];
1979    $ret .= '</a>';
1980    return $ret;
1981}
1982
1983/**
1984 * Userfunction for html_buildlist
1985 *
1986 * Prints a media namespace tree item opener
1987 *
1988 * @author Andreas Gohr <andi@splitbrain.org>
1989 *
1990 * @param array $item
1991 * @return string html
1992 */
1993function media_nstree_li($item){
1994    $class='media level'.$item['level'];
1995    if($item['open']){
1996        $class .= ' open';
1997        $img   = DOKU_BASE.'lib/images/minus.gif';
1998        $alt   = '−';
1999    }else{
2000        $class .= ' closed';
2001        $img   = DOKU_BASE.'lib/images/plus.gif';
2002        $alt   = '+';
2003    }
2004    // TODO: only deliver an image if it actually has a subtree...
2005    return '<li class="'.$class.'">'.
2006        '<img src="'.$img.'" alt="'.$alt.'" />';
2007}
2008
2009/**
2010 * Resizes the given image to the given size
2011 *
2012 * @author  Andreas Gohr <andi@splitbrain.org>
2013 *
2014 * @param string $file filename, path to file
2015 * @param string $ext  extension
2016 * @param int    $w    desired width
2017 * @param int    $h    desired height
2018 * @return string path to resized or original size if failed
2019 */
2020function media_resize_image($file, $ext, $w, $h=0){
2021    global $conf;
2022
2023    $info = @getimagesize($file); //get original size
2024    if($info == false) return $file; // that's no image - it's a spaceship!
2025
2026    if(!$h) $h = round(($w * $info[1]) / $info[0]);
2027    if(!$w) $w = round(($h * $info[0]) / $info[1]);
2028
2029    // we wont scale up to infinity
2030    if($w > 2000 || $h > 2000) return $file;
2031
2032    // resize necessary? - (w,h) = native dimensions
2033    if(($w == $info[0]) && ($h == $info[1])) return $file;
2034
2035    //cache
2036    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
2037    $mtime = @filemtime($local); // 0 if not exists
2038
2039    if($mtime > filemtime($file) ||
2040        media_resize_imageIM($ext, $file, $info[0], $info[1], $local, $w, $h) ||
2041        media_resize_imageGD($ext, $file, $info[0], $info[1], $local, $w, $h)
2042    ) {
2043        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2044        return $local;
2045    }
2046    //still here? resizing failed
2047    return $file;
2048}
2049
2050/**
2051 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
2052 * to the wanted size
2053 *
2054 * Crops are centered horizontally but prefer the upper third of an vertical
2055 * image because most pics are more interesting in that area (rule of thirds)
2056 *
2057 * @author  Andreas Gohr <andi@splitbrain.org>
2058 *
2059 * @param string $file filename, path to file
2060 * @param string $ext  extension
2061 * @param int    $w    desired width
2062 * @param int    $h    desired height
2063 * @return string path to resized or original size if failed
2064 */
2065function media_crop_image($file, $ext, $w, $h=0){
2066    global $conf;
2067
2068    if(!$h) $h = $w;
2069    $info = @getimagesize($file); //get original size
2070    if($info == false) return $file; // that's no image - it's a spaceship!
2071
2072    // calculate crop size
2073    $fr = $info[0]/$info[1];
2074    $tr = $w/$h;
2075
2076    // check if the crop can be handled completely by resize,
2077    // i.e. the specified width & height match the aspect ratio of the source image
2078    if ($w == round($h*$fr)) {
2079        return media_resize_image($file, $ext, $w);
2080    }
2081
2082    if($tr >= 1){
2083        if($tr > $fr){
2084            $cw = $info[0];
2085            $ch = (int) ($info[0]/$tr);
2086        }else{
2087            $cw = (int) ($info[1]*$tr);
2088            $ch = $info[1];
2089        }
2090    }else{
2091        if($tr < $fr){
2092            $cw = (int) ($info[1]*$tr);
2093            $ch = $info[1];
2094        }else{
2095            $cw = $info[0];
2096            $ch = (int) ($info[0]/$tr);
2097        }
2098    }
2099    // calculate crop offset
2100    $cx = (int) (($info[0]-$cw)/2);
2101    $cy = (int) (($info[1]-$ch)/3);
2102
2103    //cache
2104    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
2105    $mtime = @filemtime($local); // 0 if not exists
2106
2107    if( $mtime > @filemtime($file) ||
2108            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
2109            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
2110        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2111        return media_resize_image($local,$ext, $w, $h);
2112    }
2113
2114    //still here? cropping failed
2115    return media_resize_image($file,$ext, $w, $h);
2116}
2117
2118/**
2119 * Calculate a token to be used to verify fetch requests for resized or
2120 * cropped images have been internally generated - and prevent external
2121 * DDOS attacks via fetch
2122 *
2123 * @author Christopher Smith <chris@jalakai.co.uk>
2124 *
2125 * @param string  $id    id of the image
2126 * @param int     $w     resize/crop width
2127 * @param int     $h     resize/crop height
2128 * @return string token or empty string if no token required
2129 */
2130function media_get_token($id,$w,$h){
2131    // token is only required for modified images
2132    if ($w || $h || media_isexternal($id)) {
2133        $token = $id;
2134        if ($w) $token .= '.'.$w;
2135        if ($h) $token .= '.'.$h;
2136
2137        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
2138    }
2139
2140    return '';
2141}
2142
2143/**
2144 * Download a remote file and return local filename
2145 *
2146 * returns false if download fails. Uses cached file if available and
2147 * wanted
2148 *
2149 * @author  Andreas Gohr <andi@splitbrain.org>
2150 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
2151 *
2152 * @param string $url
2153 * @param string $ext   extension
2154 * @param int    $cache cachetime in seconds
2155 * @return false|string path to cached file
2156 */
2157function media_get_from_URL($url,$ext,$cache){
2158    global $conf;
2159
2160    // if no cache or fetchsize just redirect
2161    if ($cache==0)           return false;
2162    if (!$conf['fetchsize']) return false;
2163
2164    $local = getCacheName(strtolower($url),".media.$ext");
2165    $mtime = @filemtime($local); // 0 if not exists
2166
2167    //decide if download needed:
2168    if(($mtime == 0) || // cache does not exist
2169        ($cache != -1 && $mtime < time() - $cache) // 'recache' and cache has expired
2170    ) {
2171        if(media_image_download($url, $local)) {
2172            return $local;
2173        } else {
2174            return false;
2175        }
2176    }
2177
2178    //if cache exists use it else
2179    if($mtime) return $local;
2180
2181    //else return false
2182    return false;
2183}
2184
2185/**
2186 * Download image files
2187 *
2188 * @author Andreas Gohr <andi@splitbrain.org>
2189 *
2190 * @param string $url
2191 * @param string $file path to file in which to put the downloaded content
2192 * @return bool
2193 */
2194function media_image_download($url,$file){
2195    global $conf;
2196    $http = new DokuHTTPClient();
2197    $http->keep_alive = false; // we do single ops here, no need for keep-alive
2198
2199    $http->max_bodysize = $conf['fetchsize'];
2200    $http->timeout = 25; //max. 25 sec
2201    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
2202
2203    $data = $http->get($url);
2204    if(!$data) return false;
2205
2206    $fileexists = file_exists($file);
2207    $fp = @fopen($file,"w");
2208    if(!$fp) return false;
2209    fwrite($fp,$data);
2210    fclose($fp);
2211    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
2212
2213    // check if it is really an image
2214    $info = @getimagesize($file);
2215    if(!$info){
2216        @unlink($file);
2217        return false;
2218    }
2219
2220    return true;
2221}
2222
2223/**
2224 * resize images using external ImageMagick convert program
2225 *
2226 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
2227 * @author Andreas Gohr <andi@splitbrain.org>
2228 *
2229 * @param string $ext     extension
2230 * @param string $from    filename path to file
2231 * @param int    $from_w  original width
2232 * @param int    $from_h  original height
2233 * @param string $to      path to resized file
2234 * @param int    $to_w    desired width
2235 * @param int    $to_h    desired height
2236 * @return bool
2237 */
2238function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
2239    global $conf;
2240
2241    // check if convert is configured
2242    if(!$conf['im_convert']) return false;
2243
2244    // prepare command
2245    $cmd  = $conf['im_convert'];
2246    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2247    if ($ext == 'jpg' || $ext == 'jpeg') {
2248        $cmd .= ' -quality '.$conf['jpg_quality'];
2249    }
2250    $cmd .= " $from $to";
2251
2252    @exec($cmd,$out,$retval);
2253    if ($retval == 0) return true;
2254    return false;
2255}
2256
2257/**
2258 * crop images using external ImageMagick convert program
2259 *
2260 * @author Andreas Gohr <andi@splitbrain.org>
2261 *
2262 * @param string $ext     extension
2263 * @param string $from    filename path to file
2264 * @param int    $from_w  original width
2265 * @param int    $from_h  original height
2266 * @param string $to      path to resized file
2267 * @param int    $to_w    desired width
2268 * @param int    $to_h    desired height
2269 * @param int    $ofs_x   offset of crop centre
2270 * @param int    $ofs_y   offset of crop centre
2271 * @return bool
2272 */
2273function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2274    global $conf;
2275
2276    // check if convert is configured
2277    if(!$conf['im_convert']) return false;
2278
2279    // prepare command
2280    $cmd  = $conf['im_convert'];
2281    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2282    if ($ext == 'jpg' || $ext == 'jpeg') {
2283        $cmd .= ' -quality '.$conf['jpg_quality'];
2284    }
2285    $cmd .= " $from $to";
2286
2287    @exec($cmd,$out,$retval);
2288    if ($retval == 0) return true;
2289    return false;
2290}
2291
2292/**
2293 * resize or crop images using PHP's libGD support
2294 *
2295 * @author Andreas Gohr <andi@splitbrain.org>
2296 * @author Sebastian Wienecke <s_wienecke@web.de>
2297 *
2298 * @param string $ext     extension
2299 * @param string $from    filename path to file
2300 * @param int    $from_w  original width
2301 * @param int    $from_h  original height
2302 * @param string $to      path to resized file
2303 * @param int    $to_w    desired width
2304 * @param int    $to_h    desired height
2305 * @param int    $ofs_x   offset of crop centre
2306 * @param int    $ofs_y   offset of crop centre
2307 * @return bool
2308 */
2309function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2310    global $conf;
2311
2312    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2313
2314    // check available memory
2315    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2316        return false;
2317    }
2318
2319    // create an image of the given filetype
2320    $image = false;
2321    if ($ext == 'jpg' || $ext == 'jpeg'){
2322        if(!function_exists("imagecreatefromjpeg")) return false;
2323        $image = @imagecreatefromjpeg($from);
2324    }elseif($ext == 'png') {
2325        if(!function_exists("imagecreatefrompng")) return false;
2326        $image = @imagecreatefrompng($from);
2327
2328    }elseif($ext == 'gif') {
2329        if(!function_exists("imagecreatefromgif")) return false;
2330        $image = @imagecreatefromgif($from);
2331    }
2332    if(!$image) return false;
2333
2334    $newimg = false;
2335    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2336        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2337    }
2338    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2339    if(!$newimg){
2340        imagedestroy($image);
2341        return false;
2342    }
2343
2344    //keep png alpha channel if possible
2345    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2346        imagealphablending($newimg, false);
2347        imagesavealpha($newimg,true);
2348    }
2349
2350    //keep gif transparent color if possible
2351    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2352        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2353            $transcolorindex = @imagecolortransparent($image);
2354            if($transcolorindex >= 0 ) { //transparent color exists
2355                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2356                $transcolorindex = @imagecolorallocate($newimg, $transcolor['red'], $transcolor['green'], $transcolor['blue']);
2357                @imagefill($newimg, 0, 0, $transcolorindex);
2358                @imagecolortransparent($newimg, $transcolorindex);
2359            }else{ //filling with white
2360                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2361                @imagefill($newimg, 0, 0, $whitecolorindex);
2362            }
2363        }else{ //filling with white
2364            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2365            @imagefill($newimg, 0, 0, $whitecolorindex);
2366        }
2367    }
2368
2369    //try resampling first
2370    if(function_exists("imagecopyresampled")){
2371        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2372            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2373        }
2374    }else{
2375        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2376    }
2377
2378    $okay = false;
2379    if ($ext == 'jpg' || $ext == 'jpeg'){
2380        if(!function_exists('imagejpeg')){
2381            $okay = false;
2382        }else{
2383            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2384        }
2385    }elseif($ext == 'png') {
2386        if(!function_exists('imagepng')){
2387            $okay = false;
2388        }else{
2389            $okay =  imagepng($newimg, $to);
2390        }
2391    }elseif($ext == 'gif') {
2392        if(!function_exists('imagegif')){
2393            $okay = false;
2394        }else{
2395            $okay = imagegif($newimg, $to);
2396        }
2397    }
2398
2399    // destroy GD image ressources
2400    if($image) imagedestroy($image);
2401    if($newimg) imagedestroy($newimg);
2402
2403    return $okay;
2404}
2405
2406/**
2407 * Return other media files with the same base name
2408 * but different extensions.
2409 *
2410 * @param string   $src     - ID of media file
2411 * @param string[] $exts    - alternative extensions to find other files for
2412 * @return array            - array(mime type => file ID)
2413 *
2414 * @author Anika Henke <anika@selfthinker.org>
2415 */
2416function media_alternativefiles($src, $exts){
2417
2418    $files = array();
2419    list($srcExt, /* $srcMime */) = mimetype($src);
2420    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2421
2422    foreach($exts as $ext) {
2423        $fileid = $filebase.'.'.$ext;
2424        $file = mediaFN($fileid);
2425        if(file_exists($file)) {
2426            list(/* $fileExt */, $fileMime) = mimetype($file);
2427            $files[$fileMime] = $fileid;
2428        }
2429    }
2430    return $files;
2431}
2432
2433/**
2434 * Check if video/audio is supported to be embedded.
2435 *
2436 * @param string $mime      - mimetype of media file
2437 * @param string $type      - type of media files to check ('video', 'audio', or null for all)
2438 * @return boolean
2439 *
2440 * @author Anika Henke <anika@selfthinker.org>
2441 */
2442function media_supportedav($mime, $type=NULL){
2443    $supportedAudio = array(
2444        'ogg' => 'audio/ogg',
2445        'mp3' => 'audio/mpeg',
2446        'wav' => 'audio/wav',
2447    );
2448    $supportedVideo = array(
2449        'webm' => 'video/webm',
2450        'ogv' => 'video/ogg',
2451        'mp4' => 'video/mp4',
2452    );
2453    if ($type == 'audio') {
2454        $supportedAv = $supportedAudio;
2455    } elseif ($type == 'video') {
2456        $supportedAv = $supportedVideo;
2457    } else {
2458        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2459    }
2460    return in_array($mime, $supportedAv);
2461}
2462
2463/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2464